Base for a false tooth



FIG. 1 is a front elevation of a base for a false tooth, showing my new design;

FIG. 2 is a rear elevation thereof;

FIG. 3 is a side elevation thereof;

FIG. 4 is a top plan view thereof; and

FIG. 5 is a bottom plan view thereof. 

The ornamental design for a base for a false tooth, as shown. 